"You’re only as good as your worst day. Not because what you do the rest of the time doesn’t matter. Not because you should be expected to be perfect under immense stress or to behave according to plan when everything goes awry. But because what you do on your worst day is impossible to fake. It’s honest signaling. There’s little time for posturing or stalling. On your worst day, you reveal whether you’ve been planning for the possibility of disaster or just coasting along enjoying the good times. Your plans and preparation (or lack thereof) show how much you really care about the people who depend on you. You get to build and strengthen bonds in ways that will last a lifetime, or you risk destroying relationships in moments. You get to build trust and respect or you might break what you have irreparably.

Your worst day is a chance to show your best qualities, to stand out, and to learn an enormous amount about yourself. Very few people plan or prepare for what they’ll do and how they’ll act during those times. Those who do might well end up turning their worst day into their best. "
 -- Farnam Street